Я пытаюсь загрузить XML-данные с помощью Retrofit и проанализировать их с помощью Simple, а затем загрузить в ListView.
К сожалению, загруженные данные не отображаются на экране. Может кто-нибудь сказать мне, где проблема, пожалуйста?
Это моя модель:
@Root(name = "item")
public class Article {
@Element(name = "title")
private String title;
@Element(name = "author")
private String author;
@Element(name = "description")
private String description;
Код для интерфейса:
public interface Service {
@GET("/rss/news")
public void getArticle(Callback<List<Article>> callback);
}
Код фрагмента:
public class ArticlePreviewFragment extends Fragment {
protected ArticlePreviewAdapter adapter;
protected List<Article> previewList;
private ListView listView;
public ArticlePreviewFragment() {}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
previewList = new ArrayList<>();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_article_preview, container, false);
listView = (ListView) view.findViewById(R.id.previewList);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
adapter = new ArticlePreviewAdapter(getActivity(), previewList);
listView.setAdapter(adapter);
RestAdapter restAdapter = new RestAdapter.Builder()
.setLogLevel(RestAdapter.LogLevel.FULL)
.setEndpoint("http://muse.mu")
.setConverter(new SimpleXMLConverter())
.build();
Service service = restAdapter.create(Service.class);
Callback<List<Article>> callback = new Callback<List<Article>>() {
@Override
public void success(List<Article> articles, Response response) {
adapter.clear();
adapter.addAll(articles);
adapter.notifyDataSetChanged();
}
@Override
public void failure(RetrofitError error)
};
service.getArticle(callback);
}
}
Я использую конвертер, найденный здесь — я скопировал его в свой проект модификация/конвертер/SimpleXMLConverter.java
Наконец, код для адаптера:
public class ArticlePreviewAdapter extends ArrayAdapter<Article> {
List<Article> articlePreviewItems;
public ArticlePreviewAdapter(Activity activity, List<Article> articlePreviewItems) {
super(activity, R.layout.item_article_preview, articlePreviewItems);
this.articlePreviewItems = articlePreviewItems;
}
private static class ViewHolder {
TextView articlePreviewTitle;
TextView articlePreviewAuthor;
TextView articlePreviewDescription;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
Article articlePreviewItem = getItem(position);
if (convertView == null) {
viewHolder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.item_article_preview, parent, false);
viewHolder.articlePreviewTitle = (TextView) convertView.findViewById(R.id.articleTitle);
viewHolder.articlePreviewAuthor = (TextView) convertView.findViewById(R.id.articleAuthor);
viewHolder.articlePreviewDescription = (TextView) convertView.findViewById(R.id.articleDescription);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.articlePreviewTitle.setText(articlePreviewItem.getTitle());
viewHolder.articlePreviewAuthor.setText(articlePreviewItem.getAuthor());
viewHolder.articlePreviewDescription.setText(articlePreviewItem.getDescription());
return convertView;
}
}
РЕДАКТИРОВАТЬ: я добавил error.printStackTrace(); в методе сбоя и нашел это в logcat:
rss.reader W/System.err﹕ retrofit.RetrofitError: java.lang.ClassCastException: libcore.reflect.ParameterizedTypeImpl cannot be cast to java.lang.Class
rss.reader W/System.err﹕ at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:378)
rss.reader W/System.err﹕ at retrofit.RestAdapter$RestHandler.access$100(RestAdapter.java:220)
rss.reader W/System.err﹕ at retrofit.RestAdapter$RestHandler$2.obtainResponse(RestAdapter.java:278)
rss.reader W/System.err﹕ at retrofit.CallbackRunnable.run(CallbackRunnable.java:42)
rss.reader W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
rss.reader W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
rss.reader W/System.err﹕ at retrofit.Platform$Android$2$1.run(Platform.java:142)
rss.reader W/System.err﹕ at java.lang.Thread.run(Thread.java:818)
rss.reader W/System.err﹕ Caused by: retrofit.converter.ConversionException: java.lang.ClassCastException: libcore.reflect.ParameterizedTypeImpl cannot be cast to java.lang.Class
rss.reader W/System.err﹕ at rss.reader.SimpleXMLConverter.fromBody(SimpleXMLConverter.java:39)
rss.reader W/System.err﹕ at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:362)
rss.reader W/System.err﹕ ... 7 more
rss.reader W/System.err﹕ Caused by: java.lang.ClassCastException: libcore.reflect.ParameterizedTypeImpl cannot be cast to java.lang.Class
rss.reader W/System.err﹕ at rss.reader.SimpleXMLConverter.fromBody(SimpleXMLConverter.java:37)
rss.reader W/System.err﹕ ... 8 more
rss.reader W/System.err﹕ retrofit.RetrofitError: java.lang.ClassCastException: libcore.reflect.ParameterizedTypeImpl cannot be cast to java.lang.Class
rss.reader W/System.err﹕ at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:378)
rss.reader W/System.err﹕ at retrofit.RestAdapter$RestHandler.access$100(RestAdapter.java:220)
rss.reader W/System.err﹕ at retrofit.RestAdapter$RestHandler$2.obtainResponse(RestAdapter.java:278)
rss.reader W/System.err﹕ at retrofit.CallbackRunnable.run(CallbackRunnable.java:42)
rss.reader W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
rss.reader W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
rss.reader W/System.err﹕ at retrofit.Platform$Android$2$1.run(Platform.java:142)
rss.reader W/System.err﹕ at java.lang.Thread.run(Thread.java:818)
rss.reader W/System.err﹕ Caused by: retrofit.converter.ConversionException: java.lang.ClassCastException: libcore.reflect.ParameterizedTypeImpl cannot be cast to java.lang.Class
rss.reader W/System.err﹕ at rss.reader.SimpleXMLConverter.fromBody(SimpleXMLConverter.java:39)
rss.reader W/System.err﹕ at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:362)
rss.reader W/System.err﹕ ... 7 more
rss.reader W/System.err﹕ Caused by: java.lang.ClassCastException: libcore.reflect.ParameterizedTypeImpl cannot be cast to java.lang.Class
rss.reader W/System.err﹕ at rss.reader.SimpleXMLConverter.fromBody(SimpleXMLConverter.java:37)
rss.reader W/System.err﹕ ... 8 more